CN211926633U - Back flushing device of open water system heat exchanger - Google Patents
Back flushing device of open water system heat exchanger Download PDFInfo
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- CN211926633U CN211926633U CN202020304280.6U CN202020304280U CN211926633U CN 211926633 U CN211926633 U CN 211926633U CN 202020304280 U CN202020304280 U CN 202020304280U CN 211926633 U CN211926633 U CN 211926633U
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- pipeline
- heat exchanger
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Abstract
In the backwashing device of the heat exchanger of the open water system, circulating water passes through the heat exchanger in a one-way mode, and due to the fact that the water quality of the open circulating water is poor, a rotary filter screen cannot filter all garbage and sundries, and as equipment runs for a long time, a water inlet side flow passage of a water side part of the heat exchanger is blocked by the sundries, and the heat exchange effect of the heat exchanger is poor. This product includes: the heat exchanger is connected with a tube side water inlet pipeline and a tube side water outlet pipeline of the heat exchanger, and is connected with a shell side water inlet pipeline and a shell side water outlet pipeline of the heat exchanger, 2 backflushing pipelines with valves are connected between the tube side water inlet pipeline and the tube side water outlet pipeline, and one end of one of the backflushing pipelines is communicated with the position in front of the valve of the water inlet pipeline, and the other end of the backflushing pipeline is communicated with the position in front of the valve of the water outlet pipeline; and one end of the recoil pipeline of the other path is communicated with the position behind the valve of the water inlet pipeline, and the other end of the recoil pipeline is communicated with the position behind the valve of the water outlet pipeline. The product is used for heat exchange of closed circulation of a thermal power plant.
Description
Technical Field
The utility model relates to a be used for the water-cooled, open water system heat exchanger back flush device of closed recirculated cooling of thermal power plant.
Background
The general thermal power enterprise engineering of each phase is two units, each unit is respectively provided with 2 closed water heat exchangers, 2 main engine oil coolers, 6 feed pump oil coolers, 2 generator cooling water coolers, 2 condensate pump air coolers, 6 coal mill lubricating oil coolers, 6 coal mill hydraulic oil coolers and 2 generator hydrogen coolers, the above equipment heat exchangers are all taken away by redundant heat of cooling media through open circulating water, and closed circulating cooling water of a power plant is cooled by the open circulating water through the exchangers and then provides cooling water for equipment of various closed cooling systems of a boiler plant. Traditional open circulating water system heat exchanger open circulating water one-way heat exchanger that passes through when the design, because open circulating water quality of water itself is poor, rotary filter screen can not filter whole rubbish, debris, along with equipment long-time operation, the partial inlet side runner of heat exchanger water side is blockked up by debris, leads to the heat exchanger heat transfer effect poor. The machine must be stopped for maintenance, and the loss is large.
In recent years, domestic patent databases disclose similar water purification system technologies with backwashing functions:
application number ZL2016214130950, a water purification system with backwash function is disclosed, relate to water purification system technical field, including the former water tank that connects gradually, quartz sand filter, the active carbon filter, the safety filter ware, RO membrane module and RO aseptic water tank, the delivery port and the former water pump water inlet of former water tank are connected, former water pump delivery port and quartz sand filter water inlet are connected, first control valve is installed to quartz sand filter water inlet, a backwash and normal product water for controlling quartz sand filter, the second control valve is installed to the active carbon filter water inlet, a backwash and normal product water for controlling active carbon filter, install the vapor mixing pump on the pipeline of RO membrane module and RO aseptic water tank, the vapor mixing pump is connected with steam generator, but the device has the comparatively complicated condition of structure.
Disclosure of Invention
The utility model provides a washing debris effectual, operation convenient to use's back washing unit of open water system heat exchanger solves the long-time operation of current device, and the heat exchanger side of intaking runner is blockked up by debris, leads to the poor problem of heat exchanger heat transfer effect.
The back washing unit of the open water system heat exchanger, its composition includes: the heat exchanger is connected with a tube side water inlet pipeline and a tube side water outlet pipeline of the heat exchanger, and is connected with a shell side water inlet pipeline and a shell side water outlet pipeline of the heat exchanger, 2 backflushing pipelines with valves are connected between the tube side water inlet pipeline and the tube side water outlet pipeline, and one end of one of the backflushing pipelines is communicated with the position in front of the valve of the water inlet pipeline, and the other end of the backflushing pipeline is communicated with the position in front of the valve of the water outlet pipeline; and one end of the recoil pipeline of the other path is communicated with the position behind the valve of the water inlet pipeline, and the other end of the recoil pipeline is communicated with the position behind the valve of the water outlet pipeline.
The back washing device of the open water system heat exchanger is characterized in that a sedimentation tank is connected in parallel with a shell side water inlet pipeline, a valve is arranged at the position of the sedimentation tank of the shell side water inlet pipeline, the sedimentation tank comprises a snake-shaped or labyrinth-shaped or gourd-shaped speed reduction wall, and a sewage discharge pipeline is arranged at the bottom of the sedimentation tank.
The back washing device of the open water system heat exchanger is characterized in that the tube side and the shell side medium can be exchanged, the back washing pipeline is connected with the water inlet pipeline or the water outlet pipeline through a tee joint, and the heat exchanger is welded with the tube side water inlet pipeline, the tube side water outlet pipeline, the shell side water inlet pipeline and the shell side water outlet pipeline through pipe joints.
Advantageous effects
The utility model discloses pass through the pipeline connection of recoil pipeline with open circulating water to the pipeline of heat exchanger water inlet and heat exchanger delivery port, positive and negative direction can alternate operation, need not shut down specially and maintain. The process that the time is consumed by manpower for cleaning up the garbage of the off-stream open type circulating water system heat exchanger is avoided, the open type circulating water system heat exchanger is guaranteed to be in a bidirectional exchangeable state at any time, the operation safety of the open type circulating water system heat exchanger is improved, and the problems that the open type circulating water system heat exchanger is frequently blocked, the heat exchange effect is poor, and the operation is required to be quit for cleaning are solved.
The utility model provides a long-time operation of current device, the heat exchanger side of intaking runner is blockked up by debris, leads to the poor problem of heat exchanger heat transfer effect.
The product makes the shell pass of the heat exchanger of the open circulating water system convenient to switch from the working state to the back flush state for operation, and can ensure the normal heat exchange effect of the heat exchanger.
The utility model discloses in operation, the tube side: the closed circulation water flows through a water inlet pipeline valve 9 and a water inlet pipe connector 8 to enter the tube side of the heat exchanger, and the working process is finished through a water outlet pipeline connector 11 and a water outlet pipe valve 10 after heat exchange;
shell pass: cold water from the open cycle enters the shell pass of a heat exchanger (12) through a tee joint 16, a water inlet pipeline valve 15, a tee joint 14 and a water inlet pipe connector 13, heat of the pipe pass is taken out through heat exchange of the heat exchanger, and the shell pass is processed through a water outlet pipeline connector 7, a single pass 6, a water outlet pipeline valve 3 and a tee joint 2; during this process, the back flush line valve 4 and the back flush line valve 15 are closed.
Backflushing operation (shell pass): along with the long-time operation of equipment, the heat exchanger water side part is intake side runner and is often blockked up by debris, leads to the heat exchanger heat transfer effect poor. The water inlet pipeline valve 15 and the water outlet pipeline valve 3 are closed through back flushing operation; opening the backflushing pipeline valve 4 and the backflushing pipeline valve 15; cold water reversely enters the shell pass through the water inlet pipeline valve tee 16, the backflushing water inlet valve 4, the tee 6 and the water outlet pipeline connector 7, sewage deposited on relevant parts is reversely flushed, and backflushing is completed through the water inlet pipe connector 13, the tee 14 and the backflushing water outlet valve 5. The periodic alternate back flushing prevents too much dirt from being accumulated in the heat exchanger, and the water inlet pipeline and the water outlet pipeline of the shell pass do not need to be physically replaced in the back flushing process, so that the switching of the water inlet direction and the water outlet direction is effectively completed only under the condition of valve operation. The product enables the heat exchanger to be capable of periodically backflushing during use, and enables the working mode of the heat exchanger to comprise downstream heat exchange and upstream heat exchange.
The influent water enters a settling tank or a settling pond through the single channel 2, is subjected to deceleration settling and enters a heat exchanger after being filtered, so that the entering of dirt is reduced. When the water quality is better, the water can enter the heat exchanger without passing through a settling tank. If the tube pass is also improved, the device has reverse water inlet and outlet conditions, can work in two directions regularly, and can realize continuous working maintenance-free shutdown.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic diagram of a settling tank configuration (including a serpentine velocity reduction wall);
FIG. 3 is a schematic diagram of the construction of a settling tank (including a labyrinth-shaped decelerating wall);
FIG. 4 is a schematic diagram of the configuration of the settling tank (including the gourd-shaped decelerating wall);
wherein: 1-pipeline, 2-three-way, 3-open cycle (shell pass) water outlet pipeline valve,
4-a first back-flushing pipeline valve, 5-a second back-flushing pipeline valve, 6-a tee joint,
7-the joint of the open type circulating water outlet pipeline and the heat exchanger, 8-the joint of the water inlet pipe of the closed type circulating water inlet pipeline,
9-closed circulation pipe pass water inlet pipeline valve, 10-closed circulation pipe pass water outlet pipeline valve,
11-outlet pipeline interface of closed circulation tube pass, 12-heat exchanger,
13-joint of open circulation water inlet pipeline and heat exchanger, 14-tee joint,
15-open cycle (shell pass) water inlet pipeline valve, 16-tee.
A settling tank, 18-a snake-shaped speed reducing wall, 19-a gourd-shaped speed reducing wall, 20-a sewage draining exit and 21-a spanning valve.
Detailed Description
Example 1:
the utility model provides a back washing unit of open water system heat exchanger which constitutes and includes: and the heat exchanger 12 is connected with a tube side water inlet pipeline and a tube side water outlet pipeline of the heat exchanger, and is connected with a shell side water inlet pipeline and a shell side water outlet pipeline of the heat exchanger.
The water inlet pipeline and the water outlet pipeline of the pipe pass are connected with 2 backflushing pipelines with valves, one end of each backflushing pipeline is communicated with the front valve position of the water inlet pipeline, the other end of each backflushing pipeline is communicated with the front valve position of the water outlet pipeline, and one end of each backflushing pipeline is communicated with the rear valve position of the water inlet pipeline, and the other end of each backflushing pipeline is communicated with the rear valve position of the water outlet pipeline.
Example 2:
the back washing device of the open water system heat exchanger in the embodiment 1 is characterized in that a settling tank is connected in parallel with a shell side water inlet pipeline, a crossover valve 21 is arranged at the position of the settling tank on the shell side water inlet pipeline, the settling tank comprises a snake-shaped or labyrinth-shaped or gourd-shaped speed reduction wall, and a sewage discharge pipeline and a sewage discharge outlet 20 are arranged at the bottom of the settling tank.
Example 3
The back washing device of the open water system heat exchanger in embodiment 1 or 2, the tube side and the shell side medium can be exchanged, the open circulation system normally runs the shell side and also runs the tube side, and correspondingly, the closed circulation system can correspondingly run the tube side and also runs the shell side.
Through the connection of the backflushing pipeline, the heat exchange mode can be the original countercurrent heat exchange or the semi-cocurrent heat exchange in a backflushing state.
The backflushing pipeline is installed on a water inlet and outlet pipeline on one side of the open circulating water, and the communicated part of the backflushing pipeline and the water inlet pipeline or the water outlet pipeline is connected through a tee joint.
Because frequent replacement and cleaning are not needed, the heat exchanger is welded with the tube side water inlet pipeline, the tube side water outlet pipeline, the shell side water inlet pipeline and the shell side water outlet pipeline through pipe joints, and the sealing reliability is effectively improved.
Claims (3)
1. The utility model provides a back washing unit of open water system heat exchanger which constitutes and includes: the heat exchanger is connected with a tube pass water inlet pipeline and a tube pass water outlet pipeline of the heat exchanger, and is connected with a shell pass water inlet pipeline and a shell pass water outlet pipeline of the heat exchanger, and the heat exchanger is characterized in that: 2 backflushing pipelines with valves are connected between the water inlet pipeline of the tube side and the water outlet pipeline of the tube side, one end of one of the backflushing pipelines is communicated with the position in front of the valve of the water inlet pipeline, and the other end of the backflushing pipeline is communicated with the position in front of the valve of the water outlet pipeline; and one end of the recoil pipeline of the other path is communicated with the position behind the valve of the water inlet pipeline, and the other end of the recoil pipeline is communicated with the position behind the valve of the water outlet pipeline.
2. The backwash device for an open water system heat exchanger as claimed in claim 1, wherein: the shell side water inlet pipeline is connected with a settling tank in parallel, a valve is arranged at the position of the settling tank of the shell side water inlet pipeline, the settling tank comprises a snake-shaped or labyrinth-shaped or gourd-shaped speed reduction wall, and a sewage discharge pipeline is arranged at the bottom of the settling tank.
3. The backwash device for an open water system heat exchanger as claimed in claim 1 or 2, wherein: the tube side medium and the shell side medium can be exchanged, the communicated part of the backflushing pipeline and the water inlet pipeline or the water outlet pipeline is connected through a tee joint, and the heat exchanger is welded with the tube side water inlet pipeline, the tube side water outlet pipeline, the shell side water inlet pipeline and the shell side water outlet pipeline through pipe joints.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020304280.6U CN211926633U (en) | 2020-03-12 | 2020-03-12 | Back flushing device of open water system heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020304280.6U CN211926633U (en) | 2020-03-12 | 2020-03-12 | Back flushing device of open water system heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211926633U true CN211926633U (en) | 2020-11-13 |
Family
ID=73347350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020304280.6U Expired - Fee Related CN211926633U (en) | 2020-03-12 | 2020-03-12 | Back flushing device of open water system heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211926633U (en) |
-
2020
- 2020-03-12 CN CN202020304280.6U patent/CN211926633U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201113 |
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| CF01 | Termination of patent right due to non-payment of annual fee |